ABB COMMANDER 1900 Series Programming Manual page 42

...4 CONTROL CONFIGURATION LEVEL
4.3.3 Set Up Control Page (control actions and limits – non heat/cool)
Information.
• Two control offsets.
• Programmable control actions for all outputs.
• High/low output (or valve position) limits, when in auto control mode.
OFFSEt
---. -
HEAT/COOL
dFA-PV
------
Refer to
page 44
ACtION
dIr
rEV
OUt-HI
---. -
OUt-LO
OP ---
dFA-PV
------
40
Control Offset
Select the offset required, 0 or 50%.
PV
600
Set Point
500
400
Offset = 50%
Control Action
Select the action for the P.I.D. control output
dIr – direct acting
rEV – reverse acting
100
Output decreases
as process variable
increases
%
Output
0
Eng. Range
Reverse Acting
Output High Limit:
limits the high level of the control output value (or valve position) when in automatic mode. If the
control output is above this limit when automatic mode is selected, the output is allowed to stay
at its current level but is not allowed to go any higher. Once the control output returns to, or below, this
limit the limit then applies. When the controller is in manual mode the output limits do not apply.
Select the output high limit value (or valve position) required, between 0.0 and 100.0 in 0.1
increments.
Output Low Limit:
limits the low level of the control output value (or valve position) when in automatic mode. If the
control output is below this limit when automatic mode is selected, the output is allowed to stay
at its current level but is not allowed to go any lower. Once the control output returns to, or above, this
limit the limit then applies. When the controller is in manual mode the output limits do not apply.
Select the output low limit value (or valve position) required, between 0.0 and 100.0 in 0.1
increments.
Continued on page 43.
Prop.
Set Point
Band
Time
PV
PV
500
300
Time
Offset = 0%
100
Output increases
%
as process variable
Output
increases
0
Eng. Range
Direct Acting
Prop.
Band
PV